Singlet oxygen quantum yields QY2

20-Phorbinecarboxylic acid, 3,4,20,21-tetradehydro-3,4,8,9,13,14,18,19-octaethyl-18,19-dihydro-, ethyl ester (Octaethylpurpurin, ethyl ester)

Borland, C.F.; McGarvey, D.J.; Morgan, A.R.; Truscott, T.G.
J. Photochem. Photobiol., B 2(4): 427-34 (1988)

Sensitizer: 20-Phorbinecarboxylic acid, 3,4,20,21-tetradehydro-3,4,8,9,13,14,18,19-octaethyl-18,19-dihydro-, ethyl ester (Octaethylpurpurin, ethyl ester)
Solvent: C₆H₆
Oxygen concentration: air^a

Quantum yield of formation = 0.70

Experimental method: pulsed laser photolysis
Data type: luminescence intensity at end-of-pulse or under steady-state conditions

Reference sensitizer = BChl a; rel. to phi_Delta(ref. sens.) = 0.35; meas. phi_T(S) = 0.81; lambda_exc = 694 nm. f_Delta^T = 0.86 assuming PSO2 = 0; Proportion of T₁ quenched by O₂ = 1.

Borland, C.F.; McGarvey, D.J.; Morgan, A.R.; Truscott, T.G.
J. Photochem. Photobiol., B 2(4): 427-34 (1988)

Sensitizer: 20-Phorbinecarboxylic acid, 3,4,20,21-tetradehydro-3,4,8,9,13,14,18,19-octaethyl-18,19-dihydro-, ethyl ester (Octaethylpurpurin, ethyl ester)
Solvent: C₆H₆
Oxygen concentration: air^a

Quantum yield of formation = 0.74*; 0.65

Experimental method: pulsed laser photolysis
Data type: luminescence intensity at end-of-pulse or under steady-state conditions

Reference sensitizer = Ac; rel. to phi_Delta(ref. sens.) = 0.73; meas. phi_T(S) = 0.81; lambda_exc = 347 nm. f_Delta^T = 0.80 assuming PSO2 = 0; Proportion of T₁ quenched by O₂ = 1.

Macpherson, A.N.; Kessel, D.; Morgan, A.R.; Munro, I.; Truscott, T.G.
J. Chem. Soc., Faraday Trans. 86(18): 3081-5 (1990)

Sensitizer: 20-Phorbinecarboxylic acid, 3,4,20,21-tetradehydro-3,4,8,9,13,14,18,19-octaethyl-18,19-dihydro-, ethyl ester (Octaethylpurpurin, ethyl ester)
Solvent: MeOH
Oxygen concentration: air

Quantum yield of formation = 0.68

Experimental method: pulsed laser photolysis
Data type: luminescence intensity at end-of-pulse or under steady-state conditions

Reference sensitizer = HP; rel. to phi_Delta(ref. sens.) = 0.64; meas. phi_T(S) = 0.82. f_Delta^T = 0.83 assuming PSO2 = 0; Proportion of T₁ quenched by O₂ = 1; secondary phi_Delta(ref. sens.) = 0.41, Reference sensitizer = ZnPCS.

^a Oxygen concentration not given; assumed to be air saturated.
* Values recalculated using phi_Delta(S') or f_Delta^T(S') from Table 4 or from the quoted reference.
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